Printer&#39;s quoin.



P. SIMPSON.- PRINTERS QUOIN. APPLICATION FILED JULY 27,19 1 LQM WQG Patented Jan. 22,191

PERCY SIMPSON, OF LONDON, ENGLAND.

PRINTERS QUOIN.

Application filed July 27, 1917.

To all whom it may concern:

%o it known that I, PERCY Snrrson, a subject of the King of Great Britain, and residing at 18-19 Bowling Green Lane, Farringdon Road, London, England, have invented certain new and useful Improvements Relating to Printers Quoins, of which the following is a specification.

This invention relates to quoins such as are used hy printers in locking up type in the chase. Such quoins may however be used for a variety of other purposes in connection with printing work.

It is the object of the present invention to provide an improved form of screw quoin, the parts of which cannotpossibly fall apart, while the construction is somewhat simplified and improved in other respects, and the possible range of expansion is made greater for a given size of quoin.

The invention is illustrated in the accompanying drawings which show by way of example some forms of construction in accordance therewith.

Figure 1 shows a top plan view of a single quoin, and

Fig. 2- shows a vertical section thereof on the line A-B of Fig. 1;

Fig. 3 shows an underneath plan view of the quoin;

Fig. 4 shows a top plan view thereof with the quoin fully expanded, but with the screw removed 5 Fig. 5 shows a vertical section of the quoin as expanded. taken on the line 0-1) of Fig. 4, and showing the screw in position;

Fig. 6 shows in elevation the inner face of one of the blocks of the quoin before it is made up;

Fig. shows in perspective view the wedge piece before it is inserted in the quoin;

Fig. 8 shows in perspective view a smaller type of quoin partially expanded;

Fig. 9 is a perspective view showing a double quoin with the blocks closed together.

Referring first to Figs. 1 to 7, a and Z) are the two blocks of the quoin and o is the wedge piece. The screw oZ engages in a threaded hole at c in the wedge piece a, and its head bears upon shoulders at f on the blocks a and Z), so that as the screw is turned, the wedge c is drawn up, pressing the blocks a and Z) apart owing to the engagement of the inclined faces of the wedge against the inclined faces at g on the blocks. The wedge 0 has projecting tongues 71, at its ends which Specification of Letters Patent.

Patented Jan. 22, little.

Serial No. 183,102.

engage in slots formed at in the blocks so that as the wedge falls or is forced down between the blocks it draws them together, and prevents them from coming apart. ilhe studs Z are secured by being forced into the blocks, one stud Z being forced into each block while a hole m in a corresponding position receives the end of the stud from the opposite block.- The projecting ends of the studs are somewhat tapered as indicated.

In assen'ibling the device, the wedge is first engaged by means of its tongues it with the grooves 719 of the blocks and then the studs Z are driven in. As soon as these studs re driven in it becomes impossible afterward to separate the parts of the quoin without (li'i ing out the studs again. This is the case hccause the wedge 0 can only slide out upwardly while the blocks separate, and the studs Z prevent the wedge from rising he yond the height which it attains when its upper face comes against the studs Z as in Fig. 5.

The quoin shown in Fig. 8 has the same essential parts as that shown in Figs. 1 to T, but the screw (Z instead of having a rectangular aperture for engagement by a four-sided key, has a slot for engagement by a screwdriver. The quoin shown in Fig. 8 of smaller pattern having a smaller range of movement.

The quoin shown in Fig. 9 is the same as that shown in Figs. 1 to 7 except that the blocks a and Z) are longer and. the wedge, screw and studs are duplicated.

It will be seen that in each construction illustrated, the studs Z, m which guide the blocks as they move together are so placed that they limit the upward movement of the wedge 0, thereby limiting the expansion of the quoin without the necessity of employing any headed studs or the like for the purpose. The wedge piece 0 cannot come out of the quoin unless the studs Z, m above referred to are removed, and these studs may be driven into place, or screwed, the one in one block of the quoin and the other in the other block of the quoin as already stated. Hence, when a quoin is made up as above described, no matter how it is handled it is impossible for the two blocks a, b, to come apart and for the wedge c to fall out, and the parts are thus also preserved from liability to damage which might be caused by their being frequently taken apart and put together or interchanged. By making the studs Z, m,- somewhat tapering at their ends, and the tongues 7L and grooves 70 so that they are not a very tight fit, it is made pos sible for the quoin blocks a, Z), to take up a slightly inclined position, so that as the quoin expands it can adapt itself to lock truly against the faces with which it is intended to engage if these faces are not quite parallel. As the stud Z or m projecting from each block engages in a hole in the opposite block, it is possible for the quoin to be expanded by the full width of a block, e. the full projecting length of each stud, that length being equal to the width of the block. A slight further expansion even may be allowed, while the ends of the studs come outa little way from their holes, as the tongues h on the wedge piecevact to some extent as guides which will bring the blocks together again with the studs Z, m engaging in their holes.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is l. A screw quoin comprising a pair of blocks with inclined faces and undercut grooves formed therein, a wedge piece with projecting tongues adapted to engage in the undercut grooves and to slide therein, a screw having a head bearing on the blocks, the shank of said screw engaging in a threaded recess in the wedge piece, and means for guiding the blocks in their expanding and contracting movements away from and toward one another, said guiding means being adapted also to limit directly the upward movement of the wedge piece and consequently the expanding movement of the blocks.

2. A screw quoin comprising a pair of blocks with inclined faces and undercut grooves formed therein, a wedge piece with' projecting tongues adapted to engage in the undercut grooves and to slide therein, a

screw having a head bearing on the blocks,

the shank of said screw engaging in a threaded recess in the wedge piece,land two studs one secured in one block and the other secured in the other block said studs projecting and engaging freely in holes in the opposite blocks, and being so disposed as to form stops directly limiting the upward movement of the wedge piece relatively to the blocks.

PERCY SIMPSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

' Washington, D. C. 

